JP6569190B2 - Shell needle roller bearing - Google Patents

Shell needle roller bearing Download PDF

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JP6569190B2
JP6569190B2 JP2014080074A JP2014080074A JP6569190B2 JP 6569190 B2 JP6569190 B2 JP 6569190B2 JP 2014080074 A JP2014080074 A JP 2014080074A JP 2014080074 A JP2014080074 A JP 2014080074A JP 6569190 B2 JP6569190 B2 JP 6569190B2
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outer ring
flange
flange portion
needle roller
roller bearing
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賢 蜂須賀
賢 蜂須賀
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NSK Ltd
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Description

本発明は、シェル型針状ころ軸受に関し、例えば、エンジンやモータ等の駆動源、自動変速機や無段変速機等の変速機、コンプレッサ等の補機に使用されるシェル型針状ころ軸受に関する。   The present invention relates to a shell-type needle roller bearing, for example, a shell-type needle roller bearing used in a drive source such as an engine or a motor, a transmission such as an automatic transmission or a continuously variable transmission, or an auxiliary machine such as a compressor. About.

従来、シェル型針状ころ軸受の外輪は、軸方向両端部において径方向内方に延びる、ボトム側のフランジ部と加締め側のフランジ部とを有し、これらフランジ部により、保持器及び針状ころの外輪からの抜け止めが施されている。   2. Description of the Related Art Conventionally, an outer ring of a shell needle roller bearing has a bottom flange portion and a caulking flange portion that extend radially inward at both axial end portions. The roller is secured from the outer ring.

このような外輪は、先ず、平板状鋼板からなる外輪素材を深絞り加工してカップ状に形成した後、カップの底部を打ち抜いて一方の端部に径方向内方に延びるボトム側フランジ部を形成し、次に、軌道面を加工した後、全体に焼入れ処理（例えば、浸炭焼入れ）を施す。   Such an outer ring is formed by first deep-drawing an outer ring material made of a flat steel plate into a cup shape, and then punching out the bottom of the cup to have a bottom flange portion extending radially inward at one end. Next, after the raceway surface is processed, the whole is subjected to quenching (for example, carburizing and quenching).

そして、この外輪素材に、保持器と針状ころを組み込んだ上で、ボトム側フランジ部から離間する側の端部を径方向内方に折り曲げて加締め側フランジ部を形成する。また、カップの底部分を打ち抜いた状態で一旦焼入れ処理が施されるため、加締め側フランジ部の折り曲げ加工を行うに際しては、該曲げ部分に部分的に焼きなまし処理が施されている。   Then, after a cage and needle rollers are incorporated into the outer ring material, the end portion on the side away from the bottom flange portion is bent inward in the radial direction to form a crimped flange portion. Further, since the quenching process is once performed with the bottom portion of the cup punched out, when the crimping side flange portion is bent, the bent portion is partially annealed.

また、シェル型針状ころ軸受において、軸受内部に潤滑油を多く流入させるべく、外輪の両端部をそれぞれ内方向に向けて折り返したフランジ部を有するものが考案されている（例えば、特許文献１参照）。
さらに、ころ軸受において、外輪の軌道輪の両端部に給油孔を開口し、ハウジングに形成された給油通路から軸受内部に潤滑油を取り込んだものが知られている（例えば、特許文献２参照）。 Further, a shell needle roller bearing has been devised that has flange portions in which both end portions of the outer ring are turned inward in order to allow a large amount of lubricating oil to flow into the bearing (for example, Patent Document 1). reference).
Further, a roller bearing is known in which an oil supply hole is opened at both ends of a raceway ring of an outer ring and lubricating oil is taken into the bearing from an oil supply passage formed in a housing (see, for example, Patent Document 2). .

特開２０００−２２５０号公報JP 2000-2250 A 特開２０１１−２１６２２号公報JP 2011-21622 A

ところで、ハウジングに形成された給油通路から潤滑油を軸受に供給するような場合、特許文献１に記載のシェル型針状ころ軸受では、潤滑油を軸受内部に直接取り込むことができず、軸受の通油性を向上することが難しい。また、外輪のフランジ部によって針状ころの端面を支持する構造であるため、折り返したフランジ部の長さのばらつきによって、針状ころの端面を傷つけてしまう可能性がある。一方、特許文献２のころ軸受では、潤滑油を軸受内部に直接取り込むことはできるが、シェル型外輪について記載するものではない。   By the way, when the lubricating oil is supplied to the bearing from the oil supply passage formed in the housing, the shell-type needle roller bearing described in Patent Document 1 cannot directly take the lubricating oil into the bearing. It is difficult to improve oil permeability. In addition, since the end surface of the needle roller is supported by the flange portion of the outer ring, there is a possibility that the end surface of the needle roller may be damaged due to variations in the length of the folded flange portion. On the other hand, in the roller bearing of Patent Document 2, the lubricating oil can be directly taken into the bearing, but the shell type outer ring is not described.

本発明は、前述した課題に鑑みてなされたものであり、その目的は、針状ころを損傷することなく、ハウジングに形成された給油通路から潤滑油を軸受に供給するような場合に、通油性を向上することができるシェル型針状ころ軸受を提供することにある。   The present invention has been made in view of the above-mentioned problems, and its object is to pass through when lubricating oil is supplied to a bearing from an oil supply passage formed in a housing without damaging the needle rollers. An object of the present invention is to provide a shell needle roller bearing capable of improving oiliness.

本発明の上記目的は、下記の構成により達成される。
（１） 内周面に外輪軌道面を有する円筒部、及び、該円筒部の軸方向両端部からそれぞれ径方向内方に延びる一対のフランジ部を有する外輪と、前記外輪に転動自在に組み込まれた複数の針状ころと、前記複数の針状ころを転動自在に保持する保持器と、を備えたシェル型針状ころ軸受において、
前記複数の針状ころ及び前記保持器は、前記一対のフランジ部によって、その軸方向内側で保持されており、
前記一対のうち一方のフランジ部には、前記フランジ部から前記円筒部に亘って形成される一方の切り欠き部が一箇所以上形成されており、
前記一対のうち他方のフランジ部には、前記フランジ部のみに形成される他方の切り欠き部が一箇所以上形成されており、
前記外輪は、前記一方のフランジ部から円筒部に亘って薄肉部を有し、前記一方の切り欠き部は、前記薄肉部に形成されていることを特徴とするシェル型針状ころ軸受。 The above object of the present invention can be achieved by the following constitution.
(1) A cylindrical portion having an outer ring raceway surface on the inner peripheral surface, an outer ring having a pair of flange portions extending inward in the radial direction from both axial end portions of the cylindrical portion, and a rollable assembly in the outer ring In a shell-type needle roller bearing comprising a plurality of needle rollers and a cage that holds the plurality of needle rollers in a rollable manner,
The plurality of needle rollers and the cage are held on the inner side in the axial direction by the pair of flange portions,
One notch portion formed from the flange portion to the cylindrical portion is formed at one or more places on one flange portion of the pair,
The other notch portion formed only in the flange portion is formed in one or more places on the other flange portion of the pair ,
The outer ring has a thin wall portion extending from the one flange portion to the cylindrical portion, and the one notch portion is formed in the thin wall portion .

本発明のシェル型針状ころ軸受によれば、径方向内方に延びる一対のフランジ部によって、保持器が軸方向に規制され、針状ころを損傷することなく保持器及び針状ころの抜け止めが施され、また、一対のうち一方のフランジ部には、フランジ部から円筒部に亘って形成される一方の切り欠き部が一箇所以上形成されており、一対のうち他方のフランジ部には、フランジ部のみに形成される他方の切り欠き部が一箇所以上形成されているので、ハウジングに形成された給油通路から潤滑油を軸受に供給するような場合に、通油性を向上することができ、また、軸受内部を潤滑した潤滑油を切欠き部及び他の切り欠き部によって軸方向外側に流すことができる。 According to the shell-type needle roller bearing of the present invention, the flange portion of a pair of Ru extending radially inwardly, the cage is regulated in the axial direction, the cage and the needle rollers without damaging the needle rollers stopper is applied, also in the flange portion of one of the pair, one of the notches to be formed over the cylindrical portion from the flange portion are formed over one position and the other of the pair flanges The part has at least one other notch that is formed only on the flange, improving oil permeability when lubricating oil is supplied to the bearing from the oil supply passage formed in the housing. In addition, the lubricating oil that has lubricated the inside of the bearing can be caused to flow outward in the axial direction through the notch and other notches.

本発明の一実施形態に係るシェル型針状ころ軸受の断面図である。It is sectional drawing of the shell type needle roller bearing which concerns on one Embodiment of this invention. 図１の外輪の加締め側のフランジ部を示す斜視図である。It is a perspective view which shows the flange part by the side of caulking of the outer ring | wheel of FIG. 図１の外輪のボトム側のフランジ部を示す斜視図である。It is a perspective view which shows the flange part of the bottom side of the outer ring | wheel of FIG. 本発明の変形例に係るシェル型針状ころ軸受の断面図である。It is sectional drawing of the shell type needle roller bearing which concerns on the modification of this invention.

以下、本発明の一実施形態に係るシェル型針状ころ軸受について、図面を参照して説明する。   Hereinafter, a shell needle roller bearing according to an embodiment of the present invention will be described with reference to the drawings.

図１に示すように、本実施形態のシェル型針状ころ軸受１０は、内周面に外輪軌道面１１ａを有する円筒部１１、及び、円筒部１１の軸方向両端部から径方向内方に延びる一対のフランジ部１２、１３を有し、ハウジングＨに内嵌する外輪１４と、外輪１４に転動自在に組み込まれた複数の針状ころ２０と、複数の針状ころ２０を転動自在に保持する保持器２１と、を備える。複数の針状ころ２０及び保持器２１は、一対のフランジ部１２、１３により抜け止めが施されて、外輪１４内に保持されている。   As shown in FIG. 1, the shell needle roller bearing 10 of the present embodiment includes a cylindrical portion 11 having an outer ring raceway surface 11 a on the inner peripheral surface, and radially inward from both axial ends of the cylindrical portion 11. An outer ring 14 that has a pair of extending flange portions 12 and 13 and fits inside the housing H, a plurality of needle rollers 20 that are rotatably incorporated in the outer ring 14, and a plurality of needle rollers 20 that can roll. And a retainer 21 for holding the The plurality of needle rollers 20 and the cage 21 are held in the outer ring 14 by being prevented from being detached by a pair of flange portions 12 and 13.

一対のフランジ部１２、１３は、従来同様、一方が外輪素材を深絞り加工してカップ状に形成した後、カップの底部を打ち抜くことで形成されるボトム側のフランジ部１２であり、他方が複数の針状ころ２０及び保持器２１を組み込んだ後に加締めによって形成される加締め側のフランジ部１３である。加締め側のフランジ部１３は、円筒部１１に亘って形成される薄肉部１５によって形成され、円筒部１１の外輪軌道面１１ａを形成する部分、及びボトム側のフランジ部１２よりも肉薄に形成されている。   The pair of flange portions 12 and 13 are the flange portions 12 on the bottom side formed by punching the bottom portion of the cup after the outer ring material is deep drawn and formed into a cup shape, as in the prior art, and the other is It is the caulking side flange portion 13 formed by caulking after incorporating the plurality of needle rollers 20 and the cage 21. The caulking side flange portion 13 is formed by a thin portion 15 formed over the cylindrical portion 11, and is formed thinner than a portion forming the outer ring raceway surface 11 a of the cylindrical portion 11 and a bottom side flange portion 12. Has been.

加締め側のフランジ部１３には、図２に示すように、複数の切り欠き部１７が形成されると共に、ボトム側のフランジ部１２には、図３に示すように、複数の他の切り欠き部１６が形成されている。このうち、複数の切り欠き部１７は、該フランジ部１３から円筒部１１に亘って形成される薄肉部１５のうち、薄肉部１５のほぼ全域に、それぞれ形成されている。即ち、複数の切り欠き部１７は、フランジ部１３から円筒部１１に亘って形成される。そして、図１に示すように、ハウジングＨに形成された給油孔４０から潤滑油が供給され、軸受内部を強制潤滑によって潤滑している。この場合、外輪１４は、給油孔４０と切り欠き部１７とが、軸方向においてオーバーラップすると共に、円周方向において同位相となるように、ハウジングＨに圧入されている。また、軸受内部を潤滑した潤滑油を、切り欠き部１６、１７によって軸方向外側に流すことができ、通油性を向上することができる。   A plurality of notches 17 are formed in the caulking side flange portion 13 as shown in FIG. 2, and a plurality of other notches are formed in the bottom side flange portion 12 as shown in FIG. A notch 16 is formed. Among these, the some notch part 17 is each formed in the substantially whole area of the thin part 15 among the thin parts 15 formed ranging from this flange part 13 to the cylindrical part 11. That is, the plurality of notches 17 are formed from the flange portion 13 to the cylindrical portion 11. As shown in FIG. 1, lubricating oil is supplied from an oil supply hole 40 formed in the housing H, and the inside of the bearing is lubricated by forced lubrication. In this case, the outer ring 14 is press-fitted into the housing H so that the oil supply hole 40 and the notch 17 overlap in the axial direction and have the same phase in the circumferential direction. Moreover, the lubricating oil which lubricated the inside of a bearing can be flowed to an axial direction outer side by the notch parts 16 and 17, and oil permeability can be improved.

なお、ボトム側及び加締め側のフランジ部１２、１３の両方に、切り欠き部１６、１７が形成される場合には、切り欠き部１６、１７は、同位相に形成されてもよいし、互いに異なる位相に形成されてもよい。   In addition, when the notch parts 16 and 17 are formed in both the bottom side and the caulking side flange parts 12 and 13, the notch parts 16 and 17 may be formed in the same phase, They may be formed in different phases.

また、切り欠き部１６、１７の数は、それぞれ一箇所以上形成されればよく、また、切り欠き部１６、１７の形状も、通油性を確保できるものであれば、任意に設計できる。なお、ボトム側のフランジ部１２は、外輪１４をハウジングＨに圧入する際に押されるので、剛性を確保しつつ、切り欠き部１６を形成することが望ましい。   Moreover, the number of the notches 16 and 17 should just be formed in one or more places, respectively, and the shape of the notches 16 and 17 can be arbitrarily designed as long as oil permeability is ensured. Since the bottom flange portion 12 is pushed when the outer ring 14 is press-fitted into the housing H, it is desirable to form the notch portion 16 while ensuring rigidity.

さらに、上記実施形態では、ボトム側及び加締め側のフランジ部１２、１３の両方に、切り欠き部１６、１７が形成されているが、これに限らず、ボトム側及び加締め側のフランジ部１２、１３のいずれか一方に、切り欠き部が形成されてもよい。特に、加締め側のフランジ部１３に切り欠き部１７を設けることで、加締めが施し易い。   Furthermore, in the said embodiment, although notch parts 16 and 17 are formed in both the flange parts 12 and 13 of the bottom side and the crimping side, it is not restricted to this, The flange part of the bottom side and the crimping side A cutout portion may be formed in any one of 12 and 13. In particular, it is easy to perform caulking by providing the notch 17 in the caulking side flange portion 13.

つまり、本発明は、ハウジングＨに形成された給油孔４０に対応して、ボトム側及び加締め側のフランジ部１２、１３のいずれか一方に、フランジ部から円筒部に亘って形成される複数の切り欠き部が形成されればよい。即ち、図４に示すように、複数の切り欠き部１７が、加締め側のフランジ部１３のみに形成されるものであってもよい。
また、複数の他の切り欠き部が形成される場合には、他の切り欠き部は、フランジ部のみに形成されてもよいし、または、複数の切り欠き部と同様に、フランジ部から円筒部に亘って形成されてもよい。 That is, according to the present invention, in correspondence with the oil supply hole 40 formed in the housing H, a plurality of flange portions 12 and 13 on the bottom side and the caulking side are formed from the flange portion to the cylindrical portion. It is sufficient that a notch is formed. That is, as shown in FIG. 4, the plurality of notches 17 may be formed only in the caulking side flange 13.
Further, when a plurality of other cutout portions are formed, the other cutout portions may be formed only on the flange portion, or, like the plurality of cutout portions, from the flange portion to the cylinder. You may form over a part.

以上説明したように、本実施形態のシェル型針状ころ軸受１０によれば、切り欠き部１７がボトム側のフランジ部１２から円筒部１１に亘って形成されることで、給油孔４０からの強制潤滑にも対応しつつ、通油性を向上することができる。   As described above, according to the shell-type needle roller bearing 10 of the present embodiment, the notch portion 17 is formed from the bottom flange portion 12 to the cylindrical portion 11, so Oil permeability can be improved while supporting forced lubrication.

尚、本発明は、前述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。   In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.

１０ シェル型針状ころ軸受
１１ 円筒部
１１ａ 外輪軌道面
１２ ボトム側のフランジ部
１３ 加締め側のフランジ部
１４ 外輪
１５ 薄肉部
１６ 他の切り欠き部
１７ 切り欠き部 DESCRIPTION OF SYMBOLS 10 Shell type needle roller bearing 11 Cylindrical part 11a Outer ring raceway surface 12 Bottom flange part 13 Caulking side flange part 14 Outer ring 15 Thin part 16 Other notch part 17 Notch part

Claims (1)

内周面に外輪軌道面を有する円筒部、及び、該円筒部の軸方向両端部からそれぞれ径方向内方に延びる一対のフランジ部を有する外輪と、前記外輪に転動自在に組み込まれた複数の針状ころと、前記複数の針状ころを転動自在に保持する保持器と、を備えたシェル型針状ころ軸受において、
前記複数の針状ころ及び前記保持器は、前記一対のフランジ部によって、その軸方向内側で保持されており、
前記一対のうち一方のフランジ部には、前記フランジ部から前記円筒部に亘って形成される一方の切り欠き部が一箇所以上形成されており、
前記一対のうち他方のフランジ部には、前記フランジ部のみに形成される他方の切り欠き部が一箇所以上形成されており、
前記外輪は、前記一方のフランジ部から円筒部に亘って薄肉部を有し、前記一方の切り欠き部は、前記薄肉部に形成されていることを特徴とするシェル型針状ころ軸受。 A cylindrical portion having an outer ring raceway surface on the inner peripheral surface, an outer ring having a pair of flange portions extending radially inward from both axial end portions of the cylindrical portion, and a plurality of rolling rings incorporated in the outer ring In a shell-type needle roller bearing provided with a needle roller and a cage that holds the plurality of needle rollers in a rollable manner,
The plurality of needle rollers and the cage are held on the inner side in the axial direction by the pair of flange portions,
One notch portion formed from the flange portion to the cylindrical portion is formed at one or more places on one flange portion of the pair,
The other notch portion formed only in the flange portion is formed in one or more places on the other flange portion of the pair ,
The outer ring has a thin wall portion extending from the one flange portion to the cylindrical portion, and the one notch portion is formed in the thin wall portion .
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WO2023232178A1 (en) 2022-06-01 2023-12-07 Schaeffler Technologies AG & Co. KG Rolling bearing
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